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Note 2 - Investments - Income From Securities Transactions (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Oct. 31, 2018
Oct. 31, 2017
Oct. 31, 2018
Oct. 31, 2017
Dividend income $ 62 $ 53 $ 129 $ 105
Interest income 49 25 84 51
Other 12 13 24 31
Total income from securities transactions, net $ 123 $ 91 $ 237 $ 187